Chacaltaya (Mollo language for “bridge of winds” or “winds meeting point”, Aymara for “cold road” is a mountain in the Cordillera Real, one of the mountain ranges of the Cordillera Oriental, itself a range of the Bolivian Andes. Its elevation is 5,421 meters (17,785 ft). Chacaltaya’s glacier, which was as old as 18,000 years, had an area of 0.22 km2 (0.085 sq mi) in 1940, which had been reduced to 0.01 km2 (0.0039 sq mi) in 2007 and was completely gone by 2009. Half of the meltdown, as measured by volume, took place before 1980. The final meltdown after 1980, due to missing precipitation and the warm phase of El Niño, resulted in the glacier’s disappearance in 2009. The glacier was formerly one of the highest in South America, located about 30 kilometers (19 mi) from La Paz, near Huayna Potosí mountain.
Valle de la Luna (Moon Valley) is situated about 10 kilometers from downtown La Paz, in the Pedro Domingo Murillo Province, La Paz Department, Bolivia. It consists of an area where erosion has worn away the majority of a mountain, composed primarily of clay rather than rock, leaving tall spires. It is similar to another zone of La Paz that is known as El Valle de las Animas (The Valley of the Souls). It is an important site of the famous celebration “Dias de los Muertos” (Day of the Dead). Because the mineral content of the mountains varies greatly between individual mountains, the sides of the mountains are different colors, creating striking optical illusions. A majority of them are a clear beige or light brown color, but some are almost red, with sections of dark violet.